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BTT Octopus Pro vs Mellow 64bit FLY Gemini V3

Hello to all,
I'm going to build my first Voron 2.4 R2 350mm (all the highest specs selected in the configurator) with the following enhancements:
  • 48v system
  • Rapido V2 UHF hotend (PT1000 ???)
  • CANBus
  • Galileo (for a setup like this I suppose is a better choice rather than the stealthburner)
  • Any other enhancement I'm currectly not aware of, in the future or now (if I'm still within my budget). Suggestions are more than welcome.
I'm stuck on what control board I should choose. Initially I was 100% sure to go with the Octopus Pro, but now the FLY Gemini forced me to re-evaluate everything from scratch:
  • no need for an external host like a Raspberry
  • better CANBus integration (CAN-FD support and no extra components other than the CAN Toolhead)
  • many other advantages (interfaces, eMMC, wifi, thermal handling, onboard sensors etc), but the first twos are the ones that attract me more
However, apart the good stuff, I have to understand well what could be the possible downsides. Some that come into my mind are:
  • A site that review Voron control boards, for high performant machines recommends an Orange Pi 5B with as much RAM as one could get and this is going to be very expensive. I'm wondering if the FLY Gemini is at least on pair in terms of performance. I don't want to find myself, now or when I do an upgrade, forced to buy a new whole board due to "not enough system resources". With the Octopus I feel much safer because I can just use a cheap x86 Mini-ITX board as host.
  • It appears to use a customized (and closed source) version of Klipper. This is usually a valid reason for me to give up and look into something else, but I'm new to the world of 3D printers and someone may give me a valid reason to close an eye.
  • I've read that it comes with 8 stepper driver sockets, but in their picture I only see 4 sockets (which is not even close to the 7+ Stepper outputs board listed in the BOM)
  • I can't find any review on their AE product page, just some unanswered questions: "Is possible use dual Z Step motors with this board?", "What should I register in Clipper for this board to connect adxl345?".
  • I may have to go into advanced cooling and while I saw any kind of cooling running in Octopus boards, I have no idea if this board can handle this
Mellow produces several control boards, if there are some more suitable models for my setup, please let me know.

Thanks to all
 
I would not do a Fly Gemini. It's design is more of a Ender3 board replacement.
48v is nice but not really needed in most cases and can complicate your build.
With the Rapido UHF you will need a longer version of Steathburner or whatever toolhead you choose so keep that in mind. Also when it breaks its an expensive replacement.

Consider Beacon or Cartographer for the toolhead probe.

I would really try and stick to the stock build unless you are sure about your build skills with the exception of Galileo as I am not a fan of Clockworks.
 
What site is recommending an Orange Pi5? That's an oddball clone that was mainly used a bunch when actual Raspberry Pis were scarce. Going with a true Raspberry Pi will be an easier path. I have a Pi 4 2GB on the Trident and it's overkill and a 3B on the V0.2 because I couldn't get a Zero 2W when I was building it--so it's also overkill.
 
I would not do a Fly Gemini. It's design is more of a Ender3 board replacement.
Many thanks! Seems to be that, when performance customizations are involved, all the community agree that Octopus Pro is the only way to go. Everything else is asking for troubles.
48v is nice but not really needed in most cases and can complicate your build.
Yes, I know, needs appropriate PSUs, high voltage motors, TMC5160 drivers, (probably) advanced cooling etc. Without all of such things 48V will make very little difference. I'm prepared for this and I think will be very fun.
With the Rapido UHF you will need a longer version of Steathburner or whatever toolhead you choose so keep that in mind. Also when it breaks its an expensive replacement.
From what I've read, in a stealthburner, rapido requires a 3D printed adapter, is this what you're talking about? Same is for Galileo 1, but on Galileo 2 seems to be they fixed this issue.

I've also read that a 5015 fan should be used (I was thinking to B8500RPM, the one with the highest cooling capability). Not sure if other mods are needed, I think the best is to handle each thing over the time and one by one. Trying to get all the needed parts and complete the whole build at once is asking for troubles.

I didn't checked life time, what is supposed to break and with what frequency? The Rapido is rated as the best with the most rock solid design and I didn't saw any breakage report.
Consider Beacon or Cartographer for the toolhead probe.
Many thanks! I can't find none of the twos in the BOM list. Is this an enhancement not part of the stock design? I suppose that in my case Cartographer is mandatory because the only one with CAN compatibility. I still have to investigate on what could be the most suitable CAN board, but at first glance the Mellow ones seem the best ones in terms of features. They also sell a cheap IGUS control cable for which I saw many good feedbacks. In a 48v setup I suppose I should only go with 42mm motors, but can't find any Mellow CAN board for them. Apart from this, whatever the CAN board I'll end up with, can I expect this probe to work or I need to specifically check for compatibility?
I would really try and stick to the stock build unless you are sure about your build skills with the exception of Galileo as I am not a fan of Clockworks.
Well, this was my initial plan, a stock Voron with very little changes. Then, once I saw the users mods, I simply couldn't resist. I'm afraid is too late for me to go back. Although I still have to buy the parts, I invested lot of time in researches related to customizations. After all, user customizations is what Voron is known for. If I only wanted to go stock, I would have been better off with a Bambulab.

When I compared the twos, I saw Galileo the clear winner on most of the specs. What you don't like of the SB? I need one last reason to definitively stick with Galileo because I'm still in doubt. SB is still the most diffused in the community and there are plenty of videos, tutorials, mods etc. Even if Galileo is a bit easier to install, I feel like there are so many user mods for the SB that could make it even better than Galileo. Am I wrong?
What site is recommending an Orange Pi5? That's an oddball clone that was mainly used a bunch when actual Raspberry Pis were scarce.
I didn't posted the link because this was my first thread and I was not sure it was allowed. The main reason for the recommendation seems to be the included wifi and bluetooth, better features and all of this at pretty much the same price (see "High performance setup" section).
Going with a true Raspberry Pi will be an easier path. I have a Pi 4 2GB on the Trident and it's overkill and a 3B on the V0.2 because I couldn't get a Zero 2W when I was building it--so it's also overkill.
I can only find the Zero 2W at acceptable prices, but I have big concerns about its usability on a 2.4, even more when customized for high performance. IO Throughput is also very limited, so I can expect issues even there.

I should receive soon a Lenovo M920q (16Gb RAM, 8th gen i5-8500T cpu) that I'll use as a NAS. My original plan was to use it also as an host for the printer, but I've read in an old thread that printings are very likely to fail when klipper runs through docker. Is this true 100% of the times and in any case or something changed in the meantime?

I may be wrong, but to me, as of now, an x86 Mini-ITX board seems to be the best option. It should cost a bit more than a Zero 2W, but for sure there aren't issues with system resources and IO. I'm not sure if in the bay there is enough space for an Octopus Pro + a Mini-ITX board combo, but at worse I can always install a board on top of the other and still mantain a compact style. Am I wrong?
 
Link doesn't work, but based on the URL it's from 2022. If my memory serves (and that's debatable :LOL: ), Pis were still scarce then. The easiest IMHO would be an Octopus and Pi 3 or 4; there's tons of Vorons on that combo so lots of support.
 
Link doesn't work, but based on the URL it's from 2022. If my memory serves (and that's debatable :LOL: ), Pis were still scarce then. The easiest IMHO would be an Octopus and Pi 3 or 4; there's tons of Vorons on that combo so lots of support.
I tried and works. Try to google "Pi Alternatives for Klipper", it should appear between the first couple of results. The BOM list recommends at least PI 4. The Pi 3 seems to be barely usable (slow FFT in input shaping, laggy webcam streaming etc). I think that any board should work, as long as it can run Debian 11 and has the right CPU, RAM and I/O. So, the choice list is very long.

The scope of the thread was to understand if Gemini would have been a good All-In-One solution as Octopus replacement. It isn't at all, so I'll go back to Octopus.
 
Seems like you have done your research and ready to build.

There is no breakage report for the Rapido, just going from experience, I had a couple fail for one reason or the other and it's expensive.
Its still a good hotend.
I switched to Bambu labs because they are cheap and work incredible well.
 
Well, I spent most of the time in researches and I've nearly finished my BOM list, but since I've gone too far from a stock Voron, I'm pretty sure there are several mistakes. I'm better off to open a new thread and ask for help before I start to buy parts.

Can't say anything about your experience with Rapido breakage without know what part broke, in what condition, your hardware details etc. The hotend itself is expensive, but from what I saw, the spare parts are pretty cheap.

Initially I've been very debated between Bambulab and Voron, but then I found multiple reasons to stick with Voron. The closest model I could find was P1P which is only 256mm and a modded 350mm Voron 2.4 (supposed to be much more performant) was still cheaper. The open source nature of the project also played a big role. You are the second owner I had chance to talk with who switched to Bambulab. May I ask for what reasons? You still have both and you only use Bambulab? Model? Apart Rapido, the rest of your 2.4 is/was stock?
 
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